import java.util.Scanner;

public class Demo {
    public static void main(String[] args) {
        System.out.println("请输入一个分数：");
        Scanner scanner=new Scanner(System.in);
        int x=scanner.nextInt();

        switch (x/10){
            case 10:
            case 9:
                System.out.println("优秀");
                break;
            case 8:
                System.out.println("良好");
                break;
            default:
                System.out.println("还需努力");
                break;
        }
    }
}
